Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
  • C07F7/02—Silicon compounds
  • C07F7/08—Compounds having one or more C—Si linkages
  • C07F7/12—Organo silicon halides
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
  • C07F7/02—Silicon compounds
  • C07F7/08—Compounds having one or more C—Si linkages
  • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
  • C07F7/1804—Compounds having Si-O-C linkages

Definitions

• This invention is also directed to the preparation of the same by reaction an organisilicon compound containing an Si-H group, especially an alkoxysilane or a halosilane.
• German Pat. No. 1,069,148 names styrene, divinylbenzene or allylbenzene as examples of suitable unsaturated aliphatic or alicyclic compounds.
• the compounds made by this process do not have a benzoic acid propyl or phenoxy propyl radical substituted at the aromatic nucleus as an organofunctional radical.
• this invention contemplates organosilane compounds of the formula wherein x is NO; or N11 n is 1 or 2; z is 1 or a is 0, l or 2 but if R halogen a is l, 2 or 3, R is identical or different, alkyl, aralkyl, aryl or halogen and R is alkyl, oxalkyl or aryl.
• This invention further contemplates a process for preparing such novel organosilicon compounds which comprises contacting an aromatic allyl ester or aromatic allyl ether whose aromatic radical is substituted by l or 2 amino or nitro groups in the presence of a platinum-containing catalyst with an organosilicon compound containing an Si-H bonded in the molecule.
• organosilicon compounds containing an Si-H bond in the molecule include those having the following formula a 0, l or 2 except when R halogen and in that event a 1, 2 or 3.
• R as indicated above, is independently alkyl, aryl or aralkyl.
• R is alkyl, oxalkyl or aryl.
• R when R is alkyl it generally contains between C, and C carbon atoms. IfR is aryl, it is generally phenyl, naphthyl, biphenyl or anthracyl, especially phenyl. Where R is aralkyl the aryl group is preferably phenyl, the alkyl group contains between one and six carbon atoms. If R is halogen, the halogen can be the same or different and can be fluorine, chlorine, bromine or idoine.
• R is suitably an alkyl group of C, CH or an oxalkyl wherein the alkyl is C, to C carbon atoms, Where R is an aryl radical it is generally one of the above specifically named aryl radicals, especially phenyl.
• oxalkyl radicals are: -CH -CH -O-CH;,, 2CH2OCH2-CH3, 0r CH Cl-I O-CH --CH O-CH
• the organosilicon compound is contacted with the aromatic allyl ether or ester at a temperature between 10 and 150C, preferably between 20 and 120C for between 60 and 600 minutes, preferaboy between and 500 minutes. While the reaction can be conducted at elevated and decreased pressure, it is conventionally carried out at atmospheric pressure or under autogenous pressure. However, broadly,-the pressure can range from between 0.5 atm and 5 atm.
• aromatic allyl or aromatic allyl ester with the silane in a solvent of each reactant which is inert to the reactants and to the products.
• Suitable solvents include benzene, toluene, xylene and tetrahydrofuran.
• silane and the aromatic allyl ester or ether are reacted in stoichiometric amounts, although a stoichiometric excess of silane up to say 10 molar percent is desirable, in some cases.
• the reaction conveniently is carried out using a noble metal catalyst, especially a platinum catalyst, which is present in an amount between 0.01 and 0.2 percent by weight, based upon the weight of the reaction mixture, exclusive of solvent.
• a noble metal catalyst especially a platinum catalyst
• the preparation of the novel organosilicon compound proceeds especially well when the noble metal containing catalyst is platinum or palladium.
• catalysts include hexachloroplatinic acid hexahydrate, metallic platinum in different forms as disclosed in U.S. Pat. No. 2,970,150, platinic chloride and derivatives of platicinic chloride, as disclosed in U.S. Pat. No. 2,823,218, complex salts of platinic chloride were, for example, acetyl acetone and mesityloxide.
• platinum or noble metal compounds which contain platinum or palladium in an anionic or cationic form are also suitable.
• an especially desirable method of preparing trialkoxy substituted derivatives of the above novel organosilanes involves a process in which a process in a first step contacting the aromatic aryl ester or ether with a halosilane having the formula H-SiR wherein R is independently a halogen for a period of time between and 450 minutes, preferably in an inert solvent of the ester or ether and a solvent; thereafter contacting the nitro or amino aromatic (trihalosilylpropyl) ester or ether with an alcohol, especially a C to C alcohol in the presence of a solvent under conditions affecting evolution of hydrogen halide whereby to obtain the corresponding trialkoxysilylpropyl ester or ether.
• the first step is carried out at a temperature of between 20 and 110C and at a pressure between 760 and 1,500 mm/Hg for between 120 and 450 minutes. Stoichiometric amounts of silane are employed or silane is present in a slight excess.
• the second step is carried out at a-temperature of between 50 and 120C and hydrogen halide is caused to be evolved at these temperatures.
• the alcohol is generally a monovalent alcohol such as methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol or isobutanol.
• trichlorosilane or a trialkoxysilane is preferred as the Si-H compound.
• Trialkoxysilanes whose alkyl radicals have one to four carbon atoms each, such as trimethoxysilane, triethoxysilane, tripropoxysilane, tributoxysilane and those oxalkylated derivatives whose oxalkyl radical has one to four carbon atoms are preferred as reaction components. It has also been found that trichlorosilane and the above-named trialkoxysilanes are especially well suited for the process; the reaction time is surprisingly short and the yields are high when these components are used. I
• SiI-I compounds which can be reacted according to the invention are dimethoxychlorosilane, methyldiethoxysilane, ethyldiethoxysilane, methoxydichlorosilane, methyldichlorosilane, tris-(B-methoxyethoxy)-silane and triphenoxysilane.
• m-Nitrobenzoic acid allyl ester or p-nitrobenzoic acid allyl ester is used advantageously as the aromatic allyl ester.
• additional aromatic allyl esters which may be used as a reaction component in accordance with the invention are: o-nitrobenzoic acid allyl ester, 3,5-dinitrobenzoic acid allyl ester, and oor por m-aminobenzoic acid allyl ester and 3,5-diaminoor 2,4-diamino-or2,6-diaminobenzoic acid allyl ester.
• allyl ethers which can be reacted in accordance with the invention: nitrophenylallyl ether, m-nitrophenylallyl ether, pnitrophenylallyl ether, 3,5-dinitrophenylallyl ether, 2,4'-dinitrophenylallyl ether, 2,6-dinitrophenylallyl ether and the corresponding mono-or diaminophenylallyl ethers.
• the allyl esters and ethers are prepared by known methods, e.g., by the reaction of the corresponding phenol with allyl-halide or of the corresponding benzoic acid with allyl alcohol.
• the reaction of the mononitroor dinitrobenzoic acid allyl esters of the corresponding ethers or of a corresponding monoor diaminobenzoic acid allyl ester or of the corresponding ether, with an SiI-I compound is performed in a prior-art manner in the presence of platinum or of a platinum compound, such as hexachloroplatinic acid, as the catalyst, in the presence of solvents such as toluene if desired.
• reaction components are brought to the reaction in a solvent, in equimolar quantities at warm temperatures-of, for example, about 28C to 90C. It has proven desirable, however, to use the SiI-I compound in a slight excess, say up to l0 molar percent excess.
• the platinum compounds to be used may be either inorganic platinum compounds, such as hexachloroplatinic acid or platinum-(IV) complex compounds.
• mor pnitrobenzoic acid-(trialkoxysilylpropyll-ester) the mor p-nitrobenzoic acid allyl ester may be reacted di-- rectly with trialkoxysilane in the presence of platinum or a platinum compound as catalyst.
• the mor p-aminobenzoic acid-(trimethoxysilylpropyl) ester can be prepared by reacting the mor p-aminobenzoic acid allyi ester with trialkoxysilane, or by hidrogenating the mor pnitrobenzoic acid-(trialkoxysilylpropyl) ester with hydrogen at elevated pressure in a water-free medium in the presence of palladium, in a prior-art manner.
• Novel organosilicon compounds can be used as agents for the protection of inorganic oxidic surfaces. They can be employed to bond organic surfaces to certain metallic or inorganic substances. Generally speaking, they can be employed to bond materials such as thermoplastic and thermosetting polymers, including, in particular, polyaddition products such as epoxy resins, urethane resins, polyester resins, polyamides, polyimides, polyacetals, in the acrylic family, polyolefins, polycondensation products, to the metallic or inorganic substances. They are especially useful in connection with phenol aldehyde resins.
• They can be used to facilitate bonding of glass fibers and other materials having an inorganic oxidic surface, such as glass, quartz, diatomaceous earth, sand, clay, asbestos, mica, iron oxide, calcium carbonate, calcium sulfate and the like. They can be used in the preparation of sand cores by initially forming a cold or heat setting resin of phenol, formaldehyde and furfuryl alcohol and sodium carbonate to which is added sand. Thereafter an acid hardener such as H PO is added, together with the silane in an amount equal to 0.2 weight percent based upon the weight of the resin. The same can be formed into the desirable shape where the resin cures to the shape desired.
• an inorganic oxidic surface such as glass, quartz, diatomaceous earth, sand, clay, asbestos, mica, iron oxide, calcium carbonate, calcium sulfate and the like.
• They can be used in the preparation of sand cores by initially forming a cold or heat setting resin of phenol, formaldehy
• Timc Temperature '71 HCl of the theory min 20C 40 min 50C 50 min C 60 min 95C 70 130 min 95C 80 NH. is then passed through the reaction mediumuntil neutrality is achieved. After filtration and removal of the solvent by distillation. the crude ester is fractionally distilled.
• the ensilage with trichlorosilane was as in Example 8) thus carried out that within 7 hours at a temperature of 100C 179 g m-nitrophenylallyl ether was reacted with 111 ml HSiCl in dry toluol after addition of 100. mg H PtCl GH O.
• J tlhseoinlsglgt glgrscadrlct was isolated at a temperature of HPCHPCHPSIPQROH 10. paminophenylallyl ether mm p-aminophenylallyl ether was produced corresponding to the bibliographic prescription of W. N. White wherein X is N0 21.0., J.
• n 1 or 2
• ether can corresponding to Examples 2 or z is 0 or 1 8 with trialkoxysilanes be transposed to p-aminophenyl a is O, 1 or 2 or 1, 2 or 3 when R is halogen y y P 'Py ether- L351 mentioned R is independently selected from the group consisting pound can as well be synthetised by means of a reducf lk l aryl, lk l d h l d tion of h
• Corresponding Nozrcompound- R is independently selected from the group consistwhat is claimed is: ing of alkyl, alkyl ether radical, polyalkyl ether rad- 1.
• R is selected from the group consisting of C to C phenyl and aralkyl, wherein the aryl portion is phenyl and the alkyl portion is C, to C and R is selected from the group consisting of C to C alkyl, C to C alkyl, C, to
• a process for preparing a novel organosilicon compound of claim 1 which comprises contacting an organo-silicon compound containing an Si-H bond in the molecule in the presence of a noble metal containing catalyst with an aromatic allyl ester or an aromatic allyl ether whose aromatic radical is substituted by one or two amino or nitro groups for a period of time between 120 and 450 minutes at a temperature between 20 and C at a pressure between 760 and 1,500 mmHg and thereafter heating the resultant nitro or amino aromatic (trihalosilylpropyl) ester or ether at a temperature between 50 and C with an alcohol.
• R is independently selected from the group consisting of C, to C alkyl, phenyl, aralkyl where alkyl contains between one and six carbon atoms and the aryl portion is phenyl and halogen and R is selected from the group consisting ofC, to C alkyl, C, to C alkyl ether radical, polyalkyl ether radical and phenyl, and the reaction is carried out in the presence of platinum or platinum-containing compound as catalyst.
• a process according to claim 10 wherein the Si-H containing compound is a trialkoxysilane.
• the compound containing Si-Hgroup is selected from the group consisting of trimethoxysilane, triethoxysilane, tri-' propoxysilane, tributoxysilane and oxyalkylated silane whose oxyalkyl radical has one to four carbon atoms, trichlorosilane, dimethoxychlorosilane, methyldiethoxysilane, ethyl diethoxy silane, methoxydichlorosilane, methyldichlorosilane, tris-(B-methoxyethoxy) silane and triphenoxysilane and the allyl ester or ether is selected from the group consisting of o-nitrobenzoic acid allyl ester, 3,5 -dinitro benzoic acid allyl ester, 0- aminobenzoic acid allyl ester, p-aminobenzoic acid allyl ester, m-aminobenzoic acid ally

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• 1972
  • 1972-03-30 DE DE2215629A patent/DE2215629A1/de active Pending
• 1973
  • 1973-03-29 FR FR7311440A patent/FR2178218B1/fr not_active Expired
  • 1973-03-30 JP JP48036549A patent/JPS497255A/ja active Pending
  • 1973-03-30 US US00346528A patent/US3853935A/en not_active Expired - Lifetime

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